Concentrating photovoltaic ultraviolet disinfection device overlaid with polymer multilayer optical film

Abstract

The invention belongs to the technical field of photovoltaic power generation equipment, particularly relates to a concentrating photovoltaic ultraviolet disinfection device superposed with a polymer multilayer optical film, and aims to effectively combine photovoltaic power generation and ultraviolet disinfection functions. The device comprises an arc-shaped photovoltaic panel, a polymer multilayer optical film is attached to the outer side of the photovoltaic panel, and the film can reflect ultraviolet rays and optimize the photothermal conversion efficiency. The device is further provided with a flow channel, fluid to be disinfected is contained in the flow channel, the flow channel is located at the optical focus of the photovoltaic panel, and ultraviolet rays are focused on the fluid through the light gathering groove and the reflecting material for ultraviolet disinfection. The spiral fins and the heat conduction coatings are adopted in the flow channels, and the heat conduction effect is improved. The device not only can generate power efficiently, but also sterilizes fluid under the dual action of ultraviolet rays and heat energy, is widely applicable to various application scenes such as water treatment and beverage sterilization, and has remarkable energy efficiency improvement and environmental friendliness.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation equipment, and particularly relates to a concentrated photovoltaic ultraviolet sterilization and disinfection device with a polymer multi-layer optical film stacked thereon. Background Art

[0002] With the continuous increase in energy demand, solar energy technology, as a clean and renewable energy form, has attracted more and more attention. Photovoltaic power generation technology has been widely applied in residential, commercial, and industrial fields by converting sunlight into electrical energy. In addition, solar thermal utilization technology has also become increasingly mature, especially showing great potential in the fields of water heating and space heating. In order to improve energy utilization efficiency, more and more research focuses on combining photovoltaic power generation with heat collection technology to achieve double benefits of photovoltaic power generation and heat utilization. However, most of the existing photovoltaic power generation systems focus on power generation efficiency and heat utilization, ignoring the effective utilization of ultraviolet rays. Ultraviolet rays can be effectively used for sterilization and disinfection, but because the proportion of ultraviolet rays in solar energy is relatively low, it is generally difficult to meet the requirements of efficient disinfection. Traditional concentrated photovoltaic devices can be used for heat collection and ultraviolet collection, but the ultraviolet collection efficiency is relatively low. Summary of the Invention

[0003] The purpose of the present invention is to provide a concentrated photovoltaic ultraviolet sterilization and disinfection device with a polymer multi-layer optical film stacked thereon to solve the problems raised in the background art.

[0004] The present invention achieves the above purpose through the following technical solutions:

[0005] The present invention provides a concentrated photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film stacked thereon, including:

[0006] A photovoltaic module, the photovoltaic module includes a photovoltaic panel in an arc shape and a polymer multi-layer optical film attached to the outer arc surface of the photovoltaic panel. The polymer multi-layer optical film is a multi-film layer with alternating high refractive index film layers and low refractive index film layers, which can achieve efficient ultraviolet reflection;

[0007] A flow channel, the flow channel is arranged at the optical focus of the photovoltaic module for allowing the fluid to be disinfected to pass through and be disinfected.

[0008] Further, it further includes a base and a rotating seat arranged on the base. The rotating seat is used to support the photovoltaic module and serve as the pivot point for its rotation.

[0009] Further, the photovoltaic panel is in a square structure, with all four corners being right angles and the whole being in an arc shape.

[0010] Further, a first rotating part is provided on the rotating base, and the lower end of the photovoltaic panel is connected to the first rotating part through an angle steel member. The first rotating part is used to drive the photovoltaic module to rotate along the axial direction of the rotating base; a support part is provided at the upper end of the angle steel member, and a second rotating part is provided between the support part and the middle section of the arc edge of the photovoltaic panel. The second rotating part is used to drive the photovoltaic panel to flip with the middle section of the arc edge as the reference point;

[0011] The flow channel is arranged between the two support parts, and the flow channel further includes a liquid inlet end and a liquid discharge end.

[0012] Further, a concentrating cell is provided on the end face of the flow channel facing the photovoltaic module. An inner channel and an inner tube passing through the inner channel are provided in the flow channel, and the inner tube is used for the fluid to be disinfected to pass through;

[0013] The concentrating cell includes a fixing plate, a plurality of photovoltaic cells uniformly arranged on the fixing plate, and a concentrating groove opened in the middle section of the lower surface of the fixing plate. The concentrating groove is used to focus and concentrate the ultraviolet rays and visible light reflected by the polymer multi-layer optical film onto the inner tube.

[0014] Further, the concentrating groove is specifically an arc-shaped reflecting groove, and a reflecting material is attached to its inner wall, and the reflecting material is mainly used to reflect and focus ultraviolet rays.

[0015] Further, a heat-conducting coating is provided on the inner wall of the inner channel, and spiral fins are provided on the inner wall of the inner tube.

[0016] Further, the photovoltaic panel is of a dish-shaped structure, and its edges are distributed in a circumferential manner and are centrosymmetric.

[0017] Further, the flow channel is fixed through a connecting part connected to the edge of the photovoltaic panel; the flow channel is specifically a water storage part with an internally connected and vertically distributed position, and the water storage part supplies the fluid to be disinfected to pass through through the liquid inlet end.

[0018] Further, the polymer multi-layer optical film is obtained by a layer-by-layer doubling co-extrusion technology, and the preparation method includes the following steps:

[0019] (1) Stack two or more polymer-based melts to form a layered polymer-based melt with two or more layers;

[0020] (2) Multiply the layered polymer-based melt to obtain a multi-layer polymer-based melt;

[0021] (3) Extrude the multi-layer polymer-based melt, stretch and cool it, and wind it up to obtain the polymer multi-layer optical film.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention applies a polymer multi-layer optical film, which not only improves the photovoltaic power generation efficiency but also significantly enhances the ultraviolet sterilization function. The adopted polymer multi-layer optical film can selectively reflect ultraviolet rays and focus the ultraviolet rays on the liquid in the flow channel to achieve efficient disinfection. In particular, it has significant advantages in water treatment and liquid sterilization applications and can meet various actual application requirements.

[0024] 2. The present invention designs the photovoltaic panel as an arc structure and combines a concentrating photovoltaic panel with a concentrating trough, which can concentrate the reflected ultraviolet rays in the flow channel for sterilization. With this structure, the dual functions of power generation and sterilization can be achieved simultaneously in the same device, greatly improving the overall performance and application value of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of a concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed provided in Embodiment 1 of the present application;

[0026] Figure 2 It is a bottom view of the connection between the concentrating battery and the flow channel in the concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed provided in Embodiment 1 of the present application;

[0027] Figure 3 It is a front sectional view of the connection between the concentrating battery and the flow channel in the concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed provided in Embodiment 1 of the present application;

[0028] Figure 4 It is a side sectional view of the connection between the concentrating battery and the flow channel in the concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed provided in Embodiment 1 of the present application;

[0029] Figure 5 It is an overall schematic diagram of a concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed provided in Embodiment 2 of the present application;

[0030] Figure 6 It is a schematic diagram of the structure of a photovoltaic module in a concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed provided in the present application.

[0031] Figures 1-6Among them, 10, base; 20, rotating seat; 30, angle steel piece; 40, first rotating part; 50, second rotating part; 60, support part; 70, liquid inlet end; 75, adjusting part; 80, liquid outlet end; 90, connecting part; 100, photovoltaic module; 101, photovoltaic panel; 102, polymer multi-layer optical film; 200, concentrating cell; 300, flow channel; 201, photovoltaic cell; 202, concentrating trough; 203, reflective material; 301, inner tube; 302, spiral fin; 303, heat conducting coating; 310, water storage part. Detailed implementation manners

[0032] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as a limitation on the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0033] Embodiment 1

[0034] As Figures 1-4 shown, this embodiment proposes a concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed. The device includes a photovoltaic module 100 and a flow channel 300. The photovoltaic module 100 includes an arc-shaped photovoltaic panel 101 and a polymer multi-layer optical film 102 attached to the outer arc surface of the photovoltaic panel 101. The polymer multi-layer optical film 102 is used to reflect ultraviolet rays. This optical film has a multi-layer structure and does not reflect visible light and near-infrared light, but can selectively reflect ultraviolet rays, so it will not affect the photovoltaic power generation efficiency. The flow channel 300 is arranged at the optical focus of the photovoltaic module 100 and is used to allow the fluid to be disinfected to pass through and be disinfected. These reflected ultraviolet rays can be effectively utilized, not only having a sterilization and disinfection effect on the fluid, but also being beneficial to maintaining the power conversion efficiency of the system because it avoids the damage of ultraviolet rays to the photovoltaic cell material. The photovoltaic panel 101 is a square structure, with right angles at all four corners and an overall arc shape.

[0035] Specifically, the photovoltaic module 100 can adopt a flexible photovoltaic panel (or multiple strip-shaped ordinary photovoltaic panels to form a trough-shaped polygon), and an ultraviolet reflective film (polymer multi-layer optical film) is covered on it.

[0036] It should be noted that the above-mentioned polymer multi-layer optical film 102 is prepared by a layer-by-layer multiplication co-extrusion technology. The preparation method includes the following steps:

[0037] (1) Stack two or more polymer-based melts to form a layered polymer-based melt with two or more layers;

[0038] (2) Multiply the layered polymer-based melt to obtain a multi-layer polymer-based melt;

[0039] (3) Extrude the multi-layer polymer-based melt, stretch and cool it, and wind it up to obtain the polymer multi-layer optical film.

[0040] The above polymer multi-layer optical film 102 has a strong reflectivity in the wavelength range of 220 nm - 380 nm, and the reflectivity of the reflection peak with the maximum reflectivity in this range exceeds 90%; the overall reflectivity is 0 - 50% in the wavelength range of 1100 nm - 2500 nm, and the average transmittance is above 80% in the wavelength range of 380 nm - 780 nm.

[0041] For the preparation of the polymer multi-layer optical film 102, in specific implementation, first use the transmission matrix method and TFCalc software for optical structure design, accurately calculate and adjust the bandwidth and position of the reflection band to achieve light transmission in the visible light and near-infrared regions. This optical film has little impact on the power generation of crystalline silicon photovoltaic cells. During the preparation process, select polymer materials with high transparency, appropriate refractive index differences, and good compatibility, such as polymethyl methacrylate (PMMA) and polycarbonate (PC), and form a multi-layer structure by alternately laminating the polymer materials through the layer-by-layer multiplication co-extrusion technology. This technology uses a layer-by-layer multiplier to multiply the layered polymer-based melt to achieve rapid and precise control of the number and thickness of the film layers, and then through steps such as extrusion, stretching, and cooling, finally obtain an optical film with a multi-layer structure. This optical film can not only selectively reflect ultraviolet rays but also has long-term reliability in the wild.

[0042] By applying the above optical film in this application, it has a narrow reflection band in the visible light region (which can be controlled by adjusting the refractive index difference between the high and low refractive index layer materials. The smaller the refractive index difference of the materials, the narrower the reflection bandwidth). While endowing the film with a colorful appearance in this application, it does not significantly affect its power generation efficiency, overcoming the defect that traditional colorization methods (such as adding pigments to the glue film, color coating on the surface of the battery chip, etc.) lead to a significant reduction in power generation efficiency.

[0043] It can be understood that the above embodiment relates to a concentrated photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed, which is a device integrating photovoltaic power generation and ultraviolet sterilization and disinfection functions. By reasonably designing the configuration of the photovoltaic panel 101 and the polymer multi-layer optical film 102, and combining the concentrating battery 200 with the flow channel structure, the present invention realizes the simultaneous improvement of power generation efficiency and the use of the reflected ultraviolet rays to disinfect the fluid, thus achieving the dual utilization of solar energy.

[0044] Please combine Figures 2-4, the device further includes a base 10 and a rotating seat 20 provided on the base 10. The rotating seat 20 is used to support the photovoltaic module 100 and serves as the pivot point for its rotation. A first rotating part 40 is provided on the rotating seat 20. The lower end of the photovoltaic panel 101 is connected to the first rotating part 40 (which can be set in a knob shape) through an angle steel part 30. The first rotating part 40 is used to drive the photovoltaic module 100 to rotate along the axial direction of the rotating seat 20 so as to optimize the light receiving angle of the photovoltaic panel; a support part 60 is provided at the upper end of the angle steel part 30. A second rotating part 50 is provided between the support part 60 and the middle section of the arc edge of the photovoltaic panel 101. The second rotating part 50 is used to drive the photovoltaic panel 101 to flip with the middle section of the arc edge as the reference point, so as to further adjust the angle of the photovoltaic panel for disinfection effect and power generation efficiency; a flow channel 300 is provided between the two support parts 60. The flow channel 300 further includes a liquid inlet end 70 and a liquid discharge end 80. The circulation of the fluid to be disinfected is completed inside the flow channel through the liquid inlet end 70 and the liquid discharge end 80. The setting of the flow channel can ensure that the fluid uniformly passes through the photovoltaic module and the concentrated solar cell area, so as to make full use of the ultraviolet reflected light for disinfection.

[0045] As Figure 1 shown, an adjusting part 75 is further provided on the support part 60, which is used to finely adjust the positions of the concentrated solar cell 200 and the flow channel 300 on the support 60. The adjusting part 75 can specifically be designed as a matching structure of a fastening screw and a limiting hole. The fastening screw is used to finely adjust the positions of the concentrated solar cell 200 and the flow channel 300 while sliding along the limiting hole. The specific structure of the second rotating part 50 can be similar to the above adjusting part 75.

[0046] Further preferably, a concentrated solar cell 200 is provided on the end face of the flow channel 300 facing the photovoltaic module 100. An inner channel and an inner tube 301 passing through the inner channel are provided inside the flow channel 300. The inner tube 301 is used for the fluid to be disinfected to pass through; the concentrated solar cell 200 includes a fixing plate, a plurality of photovoltaic cells 201 uniformly arranged on the fixing plate, and a concentrating groove 202 opened in the middle section of the lower surface of the fixing plate. The concentrating groove 202 is used to focus and concentrate the ultraviolet rays and visible light reflected by the polymer multi-layer optical film 102 onto the inner tube 301. The concentrating groove 202 is specifically an arc-shaped reflecting groove, and a reflecting material 203 is attached to its inner wall. The reflecting material 203 is used to focus the ultraviolet rays, and this material can effectively enhance the focusing effect of the ultraviolet rays. A heat-conducting coating 303 is provided on the inner wall of the inner channel, and spiral fins 302 are provided on the inner wall of the inner tube 301.

[0047] It can be understood that the main function of the arc-shaped concentrating trough 202 is to focus and concentrate the ultraviolet rays reflected from the polymer multi-layer optical film 102. The ultraviolet rays reflected by the optical film are guided to the concentrating trough 202, and the light is concentrated on the position where the inner tube 301 is located through the arc-shaped reflecting surface. The arc-shaped structure utilizes the principle of light reflection and realizes the functions of focusing and concentrating light through a reasonable curvature. The reflective material 203 is attached to the inner wall of the arc-shaped concentrating trough, and its main function is to enhance the reflection effect of ultraviolet light, ensuring that the reflected ultraviolet rays can be more concentratedly focused on the inner tube 301. The reflective material has a high reflectivity, making the concentrating photovoltaic ultraviolet disinfection device of the present invention show significant advantages in improving the light energy collection efficiency.

[0048] In the above embodiment, by using the polymer multi-layer optical film, while reflecting ultraviolet rays, a high light transmittance is maintained, thereby overcoming the power generation efficiency loss caused by traditional color films.

[0049] In the above embodiment of the present invention, a part of the light is reflected and concentrated on the concentrating photovoltaic cell 200 and the flow channel 300 through the optical film, and another part passes through the photovoltaic panel 101 and is converted into electric energy.

[0050] Embodiment 2

[0051] Combined with Figure 5 and Figure 6 , this embodiment proposes a concentrating photovoltaic ultraviolet disinfection device with a polymer multi-layer optical film superimposed. The device includes a photovoltaic module 100 and a flow channel 300. The photovoltaic module 100 includes an arc-shaped photovoltaic panel 101 and a polymer multi-layer optical film 102 attached to the outer arc surface of the photovoltaic panel 101. The polymer multi-layer optical film 102 is used to selectively reflect ultraviolet rays and transmit visible light and near-infrared light; the flow channel 300 is arranged at the optical focus of the photovoltaic module 100. The photovoltaic panel 101 has a butterfly structure, and its edges are distributed in a circumferential manner and are centrosymmetric. This design helps to simplify the layout of the photovoltaic module and can optimize the focusing effect of ultraviolet light to a certain extent. The device also includes a base 10 and a rotating seat 20 arranged on the base 10. The rotating seat 20 is used to support the photovoltaic module 100 and serves as the pivot point for its rotation.

[0052] The flow channel 300 is fixed through a connecting portion 90 connected to the edge of the photovoltaic panel 101; the flow channel 300 is specifically a water storage portion 310 with an internal connection and a vertical distribution. The water storage portion 310 allows the fluid to be disinfected to pass through the liquid inlet end 70, and its design can effectively concentrate the ultraviolet light energy reflected by the photovoltaic panel.

[0053] During specific implementation, the liquid inlet end 70 introduces the fluid to be disinfected into the water storage portion 310, and the fluid will be irradiated by the ultraviolet rays reflected from the optical film on the photovoltaic panel 101 and discharged through the liquid discharge end 80.

[0054] According to the above embodiments of the present invention, this solution combines the dual effects of photovoltaic power generation and ultraviolet radiation, and has an effective disinfection function. In Embodiment 1, in the flow channel 300, ultraviolet rays are focused on the liquid through the condenser trough, and along with the concentrated action of the ultraviolet rays reflected by the photovoltaic module 100, the liquid can be exposed to high-intensity ultraviolet radiation during the pipeline flow. Ultraviolet rays, especially those in the UV-C band, can damage the DNA or RNA of microorganisms, thereby inhibiting or killing bacteria, viruses and other pathogens. It is particularly suitable for drinking water disinfection, beverage treatment and other application scenarios that require efficient disinfection.

[0055] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A concentrated photovoltaic ultraviolet disinfection device superimposed with a polymer multilayer optical film, characterized in that: include: A photovoltaic module (100), the photovoltaic module (100) comprising an arc-shaped photovoltaic panel (101) and a polymer multilayer optical film (102) attached to the arc-shaped outer surface of the photovoltaic panel (101), the polymer multilayer optical film (102) being a multilayer film layer in which high-refractive index film layers and low-refractive index film layers are alternately stacked, and is used for reflecting ultraviolet rays; A flow channel (300), the flow channel (300) is arranged at the optical focus of the photovoltaic assembly (100), and is used to allow the fluid to be sterilized to pass through and perform sterilization.

2. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 1, characterized in that: It also comprises a base (10) and a rotating base (20) arranged on the base (10), wherein the rotating base (20) is used to support the photovoltaic assembly (100) and serves as a fulcrum for its rotation.

3. The concentrated photovoltaic ultraviolet disinfection device superimposed with a polymer multilayer optical film according to claim 2, characterized in that: The photovoltaic panel (101) is a square structure, the four corners of which are all right angles, and the entire structure is arc-shaped.

4. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 3, characterized in that: The rotating seat (20) is provided with a first rotating part (40), the lower end of the photovoltaic panel (101) is connected to the first rotating part (40) through an angle steel piece (30), and the first rotating part (40) is used to drive the photovoltaic assembly (100) to rotate along the axial direction of the rotating seat (20); the upper end of the angle steel piece (30) is provided with a bracket part (60), and the bracket part (60) and the middle section of the arc edge of the photovoltaic panel (101) are provided with a second rotating part (50), and the second rotating part (50) is used to drive the photovoltaic panel (101) to flip along the middle section of the arc edge as a reference point; The flow channel (300) is arranged between the two bracket parts (60), and the flow channel (300) further comprises a liquid inlet end (70) and a liquid outlet end (80).

5. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 4, characterized in that: The end surface of the flow channel (300) facing the photovoltaic module (100) is provided with a concentrating cell (200), and the flow channel (300) is provided with an inner channel and an inner tube (301) passing through the inner channel, and the inner tube (301) is used for the fluid to be sterilized to pass through; The concentrating cell (200) comprises a fixing plate, a plurality of photovoltaic cells (201) evenly arranged on the fixing plate, and a focusing groove (202) opened in the middle section of the lower surface of the fixing plate, wherein the focusing groove (202) is used to focus the ultraviolet light and visible light reflected by the polymer multilayer optical film (102) and concentrate them onto the inner tube (301).

6. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 5, characterized in that: The light-focusing groove (202) is specifically an arc-shaped reflective groove, and a reflective material (203) is attached to the inner wall thereof. The reflective material (203) is used to assist in focusing ultraviolet light and visible light.

7. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 6, characterized in that: The inner wall of the inner channel is provided with a heat-conducting coating (303), and the inner wall of the inner tube (301) is provided with spiral fins (302).

8. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 2, characterized in that: The photovoltaic panel (101) is a butterfly-shaped structure, the edges of which are distributed in a circle and are centrally symmetrical.

9. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 8, characterized in that: The flow channel (300) is fixed by a connecting portion (90) connected to the edge of the photovoltaic panel (101); the flow channel (300) is specifically a water storage portion (310) which is internally connected and located in an upper and lower position, and the water storage portion (310) is used to allow the fluid to be sterilized to pass through the liquid inlet end (70).

10. The concentrated photovoltaic ultraviolet disinfection device with a polymer multilayer optical film superimposed thereon according to claim 1, characterized in that: The polymer multilayer optical film (102) is prepared by a layer-by-layer multiplication co-extrusion technology, and the preparation method comprises the following steps: (1) stacking two or more polymer-based melts to form two or more layers of layered polymer-based melts; (2) multiplying the layered polymer-based melt to obtain a multilayered polymer-based melt; (3) Extruding the multi-layer polymer-based melt, stretching and cooling, and rolling up to obtain the polymer multi-layer optical film (102).

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